series 3 crank..... is it ok?

davidlampard · Oct 9, 2013

So.
Bought a series 3 the other month and got it home, the bottom end was knocking. So I pulled the sump. Lots of metal.... pulled the big ends off. There not usable as its through to the copper. Got some new shells ready to fit.
So tonight pulled the 2 main caps and the oil pump. Oil pump looks as though its had a very hard life. The crank on the other hand has a large step where the oil dip runs. Its the same on both mains part of the crank.
Is the crank knackered? Basically I am hoping its strangely normal and I dont need to rebuild the engine compleatly. Strange thing isthe bearings are fine. Not hammered at all....
Hope you can help.
Thanks

jamesmartin · Oct 9, 2013

davidlampard said:
So.
Bought a series 3 the other month and got it home, the bottom end was knocking. So I pulled the sump. Lots of metal.... pulled the big ends off. There not usable as its through to the copper. Got some new shells ready to fit.
So tonight pulled the 2 main caps and the oil pump. Oil pump looks as though its had a very hard life. The crank on the other hand has a large step where the oil dip runs. Its the same on both mains part of the crank.
Is the crank knackered? Basically I am hoping its strangely normal and I dont need to rebuild the engine compleatly. Strange thing isthe bearings are fine. Not hammered at all....
Hope you can help.
Thanks

knackered ,by the sounds of it

davidlampard · Oct 9, 2013

Hmmmm how easyb is it to get hold of a new crankshaft?

divie · Oct 11, 2013

Three bearing or five? Guy on fleabay regularly has em on reground at £90ish Think he is in Lincoln. If your pockets are deep new ones still available.

davidlampard · Oct 12, 2013

Its a 3 main bearing crank. Why is there 3 or 5 bearing cranks? Guess early engines and later?? 5 bearing cranks stronger I guess?

jamesmartin · Oct 12, 2013

davidlampard said:
Its a 3 main bearing crank. Why is there 3 or 5 bearing cranks? Guess early engines and later?? 5 bearing cranks stronger I guess?

yes later were 5 bearing and are stronger ,but 3 bearings managed well enough, petrol and diesel are different in that diesel is stronger

davidlampard · Oct 20, 2013

So I am going to strip my engine to see what needs replacing/machining. Anyone know of any improvements I could do to the engine whilst in there? Anything I could do with the head?

Also I am thinking of fitting a good electric fan and removing the mechanical one,
And making some sort of drain bung for the radiator as pulling a pipe off isnt the cleanest way of draining....

series 3 crank..... is it ok?

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